Summary

This PR integrates the serverless-prune-plugin directly into the Serverless Framework core as a bundled plugin. This migration improves the developer experience by providing built-in Lambda version management without requiring external dependencies.

Key Changes

🚀 Core Integration

• New Core Plugin: Implemented Prune core plugin in packages/serverless/lib/plugins/prune/index.js.
• ESM Transition: Converted the original CommonJS codebase to ES Modules.
• Async/Await: Replaced all bluebird promises with native async/await and Promise methods.
• Plugin Manager Integration: Registered the plugin in plugin-manager.js as a core-bundled plugin. The prune command is now always available.
• Schema Validation: Defined a full JSON schema for custom.prune configuration (automatic, number, includeLayers).

📚 Documentation

• New Usage Guide: Created a comprehensive Version Pruning Guide (docs/sf/providers/aws/guide/prune.md).
• New CLI Reference: Created CLI Reference for Prune (docs/sf/providers/aws/cli-reference/prune.md).
• Navigation Update: Added "Version Pruning" to the documentation menu.

🧪 Testing & Verification

• Jest Test Suite: Migrated the original Mocha suite to a native Jest suite with 33 comprehensive tests.
  • Passes with 100% success: npm run test:unit -- test/unit/lib/plugins/prune/index.test.js
• Manual Verification: Verified serverless prune command and automatic pruning after deployment using a real AWS test service.
• Security: Passed Snyk Code scan with 0 issues.

Verification Results

Unit Tests

PASS test/unit/lib/plugins/prune/index.test.js
Test Suites: 1 passed, 1 total
Tests:       33 passed, 33 total

Manual CLI Test (Dry-run)

$ serverless prune -n 3 --dryRun --verbose
Dry-run enabled, no pruning actions will be performed.
✔ Pruning of functions complete